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The importance of the ozone layer to terrestrial animals is [#permalink]
10 May 2011, 10:46

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This post receivedKUDOS

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A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

72%(02:21) correct
28%(01:34) wrong based on 342 sessions

The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.

Which one of the following is most strongly supported by the statements above, if they are true?

A. All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.B. Few species of animals live on a part of the earth’s surface that is not threatened by holes in the ozone layer.C. Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight.D. A single wavelength of sunlight can cause severe damage to the eyes of most species of animals.E. Some wavelengths of sunlight that cause eye damage are more likely to reach the earth’s surface where there are holes in the ozone layer than where there are not.

Yes, "all" MAY include "many".For example, if you have 100 balls, "many" could be 50 or 100 balls. In both cases, they are a lot! It is an ambiguous term. In this sense, you must be careful of what "many" could mean.

However, I think that " many " is not critical to eliminate C. "Any" is most important in that choice.

I think I deserve kudos _________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

Yes, "all" MAY include "many".For example, if you have 100 balls, "many" could be 50 or 100 balls. In both cases, they are a lot! It is an ambiguous term. In this sense, you must be careful of what "many" could mean.

However, I think that " many " is not critical to eliminate C. "Any" is most important in that choice.

Re: The importance of the ozone layer to terrestrial animals is [#permalink]
10 Nov 2013, 09:10

The key thing here to note is the phrase "severe eye damage"

The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.

Which one of the following is most strongly supported by the statements above, if they are true?

A. All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.Close but flawed.No one said that other wavelengths cannot cause damage, Its just that they can't cause severe damage.So all the wavelengths need not be filtered out. B. Few species of animals live on a part of the earth’s surface that is not threatened by holes in the ozone layer.Can't say. Maybe more live maybe notC. Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight.Is not supported by above statementsD. A single wavelength of sunlight can cause severe damage to the eyes of most species of animals.Not supportedE. Some wavelengths of sunlight that cause eye damage are more likely to reach the earth’s surface where there are holes in the ozone layer than where there are not.True, ozone filters some of the wavelengths, so the rays are more likely to reach the surface of earth where there are holes in the surface of earth. _________________

Re: The importance of the ozone layer to terrestrial animals is [#permalink]
11 Nov 2013, 05:52

ramannanda9 wrote:

The key thing here to note is the phrase "severe eye damage"

The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.

Which one of the following is most strongly supported by the statements above, if they are true?

A. All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.Close but flawed.No one said that other wavelengths cannot cause damage, Its just that they can't cause severe damage.So all the wavelengths need not be filtered out. B. Few species of animals live on a part of the earth’s surface that is not threatened by holes in the ozone layer.Can't say. Maybe more live maybe notC. Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight.Is not supported by above statementsD. A single wavelength of sunlight can cause severe damage to the eyes of most species of animals.Not supportedE. Some wavelengths of sunlight that cause eye damage are more likely to reach the earth’s surface where there are holes in the ozone layer than where there are not.True, ozone filters some of the wavelengths, so the rays are more likely to reach the surface of earth where there are holes in the surface of earth.

We have this in the stem:" However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species."

Why can't we infer from this that C is the right answer?Clearly we are told that there will be damage to MOST species.This means that SOME will not be hurt....?

Re: The importance of the ozone layer to terrestrial animals is [#permalink]
16 Nov 2013, 05:12

ronr34 wrote:

ramannanda9 wrote:

The key thing here to note is the phrase "severe eye damage"

The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.

Which one of the following is most strongly supported by the statements above, if they are true?

A. All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.Close but flawed.No one said that other wavelengths cannot cause damage, Its just that they can't cause severe damage.So all the wavelengths need not be filtered out. B. Few species of animals live on a part of the earth’s surface that is not threatened by holes in the ozone layer.Can't say. Maybe more live maybe notC. Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight.Is not supported by above statementsD. A single wavelength of sunlight can cause severe damage to the eyes of most species of animals.Not supportedE. Some wavelengths of sunlight that cause eye damage are more likely to reach the earth’s surface where there are holes in the ozone layer than where there are not.True, ozone filters some of the wavelengths, so the rays are more likely to reach the surface of earth where there are holes in the surface of earth.

We have this in the stem:" However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species."

Why can't we infer from this that C is the right answer?Clearly we are told that there will be damage to MOST species.This means that SOME will not be hurt....?

Precisely because the argument says severe damage and the option C says no damage. But there can be minor damage even of there is no severe damage.

Re: The importance of the ozone layer to terrestrial animals is [#permalink]
11 Mar 2015, 08:55

Answer should be E.This argument is one of those in which we need to take care of the words such as many, some, all etc. All the options can be rejected if we take care of these quantity words but option E.It is mentioned in the argument that the holes cause the effect, so it can be inferred that where there is no hole effect will not be there. _________________

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gmatclubot

Re: The importance of the ozone layer to terrestrial animals is
[#permalink]
11 Mar 2015, 08:55